package com.pavlinic.mylisp;


public class NullExpression extends ListExpression implements Expression {
  public static final NullExpression INSTANCE = new NullExpression();
  
  private NullExpression() {
  }
  
  @Override
  public Expression evaluate(EvaluationContext evaluationContext) {
    return this;
  }
  
  @Override public String toString() {
	  return "null";
  }
}
